Spool hydraulic directional control valve 31

poppetpilot-operatedelectro-hydraulic

Product description
The Series 31 from Moog is a two-stage, flow-controlled servovalve featuring a dual-nozzle pilot stage with mechanical feedback, a stainless steel housing and an integrated torque motor housed in an environmentally sealed compartment. The nozzle-flapper design delivers high response, stability and accuracy in a compact package, making it suitable for applications that require fast dynamic control and precise regulation. Compared with the higher-flow Series 30, Series 31 provides a performance density of nearly 0.75 HP per oz. equivalent (9.3 HP total). A range of options is available, including vented or non-vented motor caps, pigtail versions for simplified installation, tie-wrap options and specialized connectors.

Features

• Two-stage flow-control servovalve with dual-nozzle and mechanical feedback
• Low-friction dual-nozzle pilot stage for high resolution and low hysteresis
• Designed for demanding environments including shock, vibration and high pressure
• Ultracompact, lightweight package
• Fast response for improved controllability
• Stainless steel housing and integrated torque motor in an environmentally sealed compartment

Specifications
Hydraulic data
Rated flow*: 3.8 to 15.0 l/min
Standard configurations: 3.8, 9.4, 15.0 l/min
Max. operating pressure: 275 bar

Performance data
100% step response**: 2.5 ms
Frequency response***: 200 Hz

Electrical data
Rated command signal****: 10 to 40 mA
Standard configurations: 10, 20, 40 mA

Physical data
Size (mounting pattern): Size 2 (ISO 10372-02-02-0-92)
Weight: 370 g

Options: vented motor cap, reverse polarity, pigtail versions, special connectors, tie-wrap options

* @ Δp 70 bar (1,000 psi)
** Response at 3,000 psi system pressure
*** at 90° phase lag
**** Single coil